Apparatus for machining workpieces



Sept. 5, 1944. R, RYFFE 2,357,610

APPARATUS FOR MACHINING WORK P IECES Filed May 14, 1941 Patented Sept. 5, 1944 I APPARATUS FOR MACHINING wort moss Robert Ryff, Zurich, Switzerland, assignor of one-half to Josu Goldschmidt, Zurich, Switzerland Application May 14, 1941, Serial No. 393,421 In Switzerland October 11, 1939 1 Claim. (CI. 8234) This invention relates to apparatus chining work pieces.

For the mechanical production of work pieces, for example, steel workpieces that are to be profor mavided with center-marks or punchings and serve, 1

for example, for the production of templates consisting of brass and being in the form of plates or bridges for clockworks ortime fuses,'formerly,

so-called pattern drillingmachines or measuring machines have been employed. In machines of this kind the points to be provided with centermarks or punchings are determined by means of a displaceably guided working part. This mode of producing work pieces of the kind mentioned above is, however, complicated and thus timeconsuming.

The apparatus for machining work pieces, according to the invention, is provided with a rotatable member with which a carrier adapted to be adjusted circumferentially of said member in accordance with a division is associated, a crossed-slide mechan sm for the reception of the work piece being arranged on said carrier and cooperating with a measuring device for the adjustment of the crossed slides relative to the axis of the rotatable member.

This apparatus allows of determining in a simple manner the situation of points of a work piece at which the latter is to be worked as well as 01' working center-marks into the work piece, and boring, turning out, grinding the latter, and so forth. Templates in the form of plates or bridges for purposes previously referred to can be worked in this apparatus directly, as required, so as to be fit for use after havin undergone different working operations. The apparatus can be built into existing machine tools, for example lathes, with ease.

An embodiment of the invention is illustrated in the accompanying drawing in which Fig. 1 shows an axial section of this embodiment;

Fig. 2 is a front end elevation thereof partly in section, and

Fi 3 is a horizontal axial section of Fi 2.

Referring to Fig. 1, therotatable member which is designated by I is carried by a driving shaft 2 mounted in a bearing 3 resting on the bed 4 of a lathe and being axially displaceable and fixable in position of adjustment on the bed 4 by means of toggle levers 3 and clamping members 3". The shaft 2 is coupled, by means of a detachable driving member 5, to an eccentric pin 6 on a driving disc I which is arranged on the spindle 4 of the head stock 4' of the lathe. By this means the rotatable member I isin driving asso ciation with the head stock spindle 4".

' On the front end of the rotatable member Ia dish-shaped carrier 8 is arranged which isloosely mounted on a central axle pin Ilia of the rotatablemember I and engages into an annular groove I0 concentrically formed in the member I, by means of shoes 9, so as to be rotatableabout the axis of the rotatable member. The-shoes!) can be fixed in position in the annular groove I0 from outside by eccentric bolts I Iby means of a square-bore socket wrench. In this way the position of the carrier 8 circumferentially of the rotatable member I can be determined. The angular position of the carrier 8 relative to the member I can be read on a peripheral division.

As shown in Fig. 1, the rotatable member I is locked in place in a position corresponding with the zero-mark of the said division, by a locking bolt I2 engaging into a conical bore in said member. The locking bolt I2 is displaceably guided in the bearing 3 and can be longitudinally displaced by means of a pinion I3. After retraction of the locking bolt-I2 the rotatable member I can be driven in unison with the carrier 8 by the shaft 2.

On the carrier Ii are arranged a slide I4 associated with a screw spindle I5 and a slide I6 associated with a screw spindle I I, the latter being mounted on the slide I4, whereas the screw spindle I5 is arranged in a mounting member I8 fixed to the carrier 8. The two slides I4, I 6, being interconnected by slide guides, form together with the member I8 a crossed-slide mechanism, the screw spindles I5, ll of which can be controlled by a square-bore socket wrench which is insertable in the direction from the circumference of the carrier 8 for the purpose of adjusting the two slides individually. The two screw spindles I5, I I each carry circumferentially thereof a disc I5 or H, respectively, which discs are each provided with a division cooperating with a nonius which is arranged on a disc I9 or 20, respectively, the latter discs being mounted on the carrier 8 for limited angular displacement.

On the exposed front end of the carrier 8 a holding plate 2| is screwed on to the slide It. On this holding plate the work piece to be Worked is fixed, for example, by means of fastening screws, which are inserted through holes provided in the work piece, or by using clamping means of conventional kinds. I

By turning the screw spindles I5, I! the slides I4, I6 can be adjusted as required, when the rotatable member I is set into zero-position and In this way, for example;

carrier discs adapted for performing limited rotative movements.

In the embodiment described the driving association between the lathe and the apparatus according to the invention can be released by detaching the driving member 5 so that the apparatuscan be'dismounted from the lathe, when not in use, with the aid of toggle levers 3'.

The apparatus according to the invention can be constructed as a separate machine instead of as an auxiliary as described.

I claim;

shape to be worked into the work piece can be determined which holes are thenbored into the work piece in the lathe without removing it from the latter.

If a work piece consisting of steel is to be worked the same may subsequently beremoved for hardening it and then be secured in position on the holding plate 2| again by correspondingly adjusting the crossed'slides; for the purpose of grinding the bored holes to size. Prior to effecting the boring; turning out-or grinding to-size on the workpiece'the rotatable member l isio'bviously rotated after the lockingbolt l-2 rhasibeen retracted. 1 By means of theauxiliary apparatus described work pieces intended to serve: as templates for plates or bridges for clockworks' or for punching purposes or the like can be precisely worked. I t a q To each of the screw spindles 15, H of the two slides I 4, 16 is correlated a rectifyingrule 12 or 23 respectively bybeing arranged on therespective slide in a :known ,manner so ias to co- Operate with feeler members 25, 26: respectively F that are integral with the respectivel nonius In an apparatus for machining work pieces, arotatable member, a bearing rotatably carrying said rotatable member, said rotatable member having a division scale having a zero-setting mark associated therewith in concentric relation to the rotation axis of said member, a locking member interposed between said bearing and said rotatable member for locking the latter to the former in a position of said rotatable member corresponding with the zero-setting of said division scale, a carrier operatively connectible with said rotatable member for common rotation therewith and adjustable circumferentially of said member in accordance with said division scale, a crossed-slide mechanism for the reception of a Work piece by means of said crossed slides arranged on said carrier, and a measuring device associated with said mechanism for adjusting said crossed slides relative to said axis of said rotatable member for working said work piece at the point of said piece as adjusted by means of said crossed-slide mechanism.

ROBERT R-YFFE. 

